Speed-clock.



PATENTED AUG. 23, 1904.

K. H. MOINTYRE.

SPEED CLOCK.

APPLIOATION FILED MAY 2. 1904.

2 SHEETS-SHEET 1.

NO MODEL.

Patented August 23, 1904.

KENNETH H. MOINTYRE, OF CARL, NORTH CAROLINA.

SPEED-CLOCK.

SPECIFICATION forming part of Letters Patent No. 768,394, dated. August23, 1904:.

Application filed May 2, 1904. Serial No. 205,946. (No model.)

To (LZZ whom it may concern.-

clocksor speed-gages for machinery, the device being designed toindicate whether or not machinery is making a predetermined speed ornumber of rotations in a-given time and to show how much time has beenlost or gained when the machinery may be moving at rate other than thatpredetermined and desired.

The invention contemplates the provision of means which can be readilyadjusted for use at different rates of speed. Thus if the clock has beenadjusted for one rate of speed adjustment for a higher or lower speedcan easily be made should the desired rate of speed of the machinery bealtered.

Another object of the invention is to improve devices of this characterwith a view of attainment of more accurate results and also with a viewof simplifying the general construction of the same.

An embodiment of the invention possessing all of the foregoing and otherdesirable characteristics is delineated for purposes of illustration inthe accompanying drawings, forming part hereof, and upon inspection ofwhich novel details in the construction and arrangement of the variousparts will be apparent. However, it will be obvious that changes andalterations in the specific construction disclosed within the limitsprescribed by the claims can readily be made and that the invention issusceptible of various other adaptations without in the least departingfrom its nature and spirit.

In the drawings like reference characters refer to corresponding partsin the several views, of which Figure 1 is a front view. Fig. 2 is aview looking from the top, showing the mechanism. Fig. 3 is a back view.Fig. 4 is an enlarged view of the actuating mechanism. Fig. i

'5 is a view of the ratchet, and Fig. 6 is an- ,moved from arbor 6through gearings v7, 8,

9, 10, 11, and 12, which impart the proper relative movements to thehands in amanner substantially similar to an ordinary clock.

Fastened to arbor 6, so as to rotate therewith, is a flat wheel 13,having in one face thereof recesses 14, arranged in circles concentricwith said wheel, and the recesses of each circle being equidistant.

A bar 15 is mounted on arbor 6 and arranged to rock adjacent to wheel13. The bottom part of bar 15 is made angular in cross-section, and onthis part of the bar a collar 16 is longitudinally adjustable and isheld in place by a set-screw 17, arranged to engage said bar. Upon ajournal 18 of collar 16 is mounted a ratchet 19, which is caused toengage wheel 13 and recesses 14 therein by the exertion of a spring 20,mounted on said collar. It will thus be seen that when bar 15 is rockedon its pivot wheel 13 will be caused to move with each alternatemovement of the bar by engagement of ratchet 19 in recesses 14. Bymoving collar 16 along bar 15 the ratchet 19 can be adjusted so as toengage any desired circle of recesses.

To prevent backward motion in wheel 13, a collar 21, similar to collar16 and having thereona pawl 22, is adjustably mounted on a bar 23, sothat pawl 22 may be so placed as to engage the recesses of any desiredcircle.

Attached to bar 15 at or near its top is an armature 24, arranged insuch position as to be capable of movement by the attraction of a magnet25 when magnetized by an electric current conveyed from any suitablesource through wires 26.

An adjusting-screw 27 is mounted adjacent to bar 15, and said screw andmagnet 25 serve to limit the reciprocatory movement of the top of saidbar in an obvious manner. A spring 28 is so connected to bar 15 and tosome other suitable support as to have a tendency to draw armature 2 1away from magnet 25.

The electric current in wires 26 is made and broken by any suitablemeans with every rotation, revolution, reciprocation, or other movementof the machinery whose speed is to be indicated. A suitable switch 29 isprovided in the circuit to disconnect the clock from the machinery. Whenthe circuit is made, magnet 25 will draw armature 24 thereagainst, andthus move bar 15 and wheel 13, and when the circuit is broken and themagnet becomes demagnetized the bar will be caused by spring 28 toreturn to its original position. Screw 27 is so set that just a sufiicient motion will occur in bar 15 to rotate wheel 13 the requisitedistance, with the result that the recess next behind that last engagedwill be engaged by ratchet 19 when the bar is returned to its originalposition. It will thus be seen that with each rotation or other movementof the machinery wheel 13 is rotated the distance between two ofrecesses 1 1111 the circle engaged by ratchet 19. Pawl 22 will preventbackward motion in wheel 13 during the return sweep of bar 15, this pawlbeing preferably set to engage the same circle of'recesses as ratchet19.

The mechanism of the clock is so relatively arranged that one rotationof wheel 13 will cause the several hands on the face of the clock tomove a space of one minute. The number of recesses 14 in the concentriccircles of wheel 13 are certain and determined in each circle; but thenumber decreases from the largest circle to the smaller. When, forinstance, an engine electrically connected with the speed-clock has hadits governor set for a speed of a certain number of rotations perminute, ratchet 19 is set to engage the circle in wheel 13 containingthe number of recesses equal to the required number of rotations perminute of the engine, and therefore that number of rotations of theengine will be required to cause one .complete rotation of wheel 13 andthe movement of the hands the space of one minute. At the time thespeed-clock is started it will be set with an ordinary time-clock, andif the engine is maintained at the predetermined speed the speed-clockwill at all times agree with the time-clock. However, if the speed ofthe engine is greater or less than that predetermined the speed-clockwill be faster or slower, respectively, than the time-clock. At the endof a working day, or any other period of time the difference between thespeed-clock and the time-clock will indicate how much time Within thatperiod in the output of a factory has been lost or gained throughvariation of the speed of the machinery from that predetermined. When itis desired to set the speed-clock for a speed which requires a greateror less number of recesses on wheel 13-than the one then in use, thatwheel can be removed and another substituted having therequired numberof recesses.

The provision of electrical connection between the machinery and thespeed-clock will permit the clock to be placed at any distance desiredfrom the machinery.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is- 1 1. In a speed-clock, a wheel havingradiallyarranged recesses in one face thereof, a rockbar adjacent tosaid wheel, and means longitudinally adjustable on said barwhereby saidwheel is rotated.

2. In combination with means for imparting motion to the hands of aspeed-clock, a wheel having recesses arranged in concentric circles inone face thereof, a rock-bar adjacent to said wheel, and alongitudinally-adjustable ratchet on said bar whereby said wheel isrotated.

3. In combination with means for iinparting motion to the hands of aspeed-clock, a wheel having recesses arranged in concentric circles inone "face thereof, a rock-bar adjacent to said wheel, a ratchet on saidbar whereby saidWheel is rotated, and means for preventing backwardmotion in said wheel.

4:. In combination with means for imparting motion to the hands of aspeed-clock, a wheel having recesses arranged in concentric circles inone face thereof, a rock-bar adjacent to said wheel, a ratchet on saidbar arranged to engage said recesses and whereby said Wheel is rotated,and a pawl engaging said recesses whereby backward motion in said wheelis prevented.

5. In combination with means for impart.

ing motion to the hands of a speed-clock, a Wheel having recessesarranged in concentric circles in one face thereof, a rock-bar adjacentto said wheel, a ratchet on said bar and engaging said wheel, andelectrical means whereby said bar is moved and said wheel is rotated.

6. In combination with means for imparting motion to the hands of aspeed-clock, a Wheel having recesses arranged in concentric circles inone face thereof, a rock-bar adjacent to said wheel, a ratchet on saidbar and engaging said Wheel, an armature on said bar, a magnet wherebysaid bar is attracted and said bar moved in one direction, and meanswhereby said bar is moved in contrary direction.

7 In combination with means for imparting motion to the hands of aspeed-clock, a wheel having recesses arranged in concentric circles inone face thereof, a rock-bar adjacent to said wheel, a ratchet on saidbar and engaging said wheel, an armature on said bar, a magnet wherebysaid bar is attracted and said bar moved in one direction, and a springwheel having recesses arranged in concentric circles in one facethereof, a rock-bar adjacent to said wheel, a ratchet on said bar andengaging said wheel, electrical means wherebysaid bar is moved and saidwheel is rotated, and a set-screw whereby movement of said bar islimited.

In testimony whereof I aflix my signature in presence of two witnesses.

KENNETH H. MCINTYRE. Witnesses:

N. S. CocHRAN, BEN T. WADE.

